Linux uses the X Window system as the underlying engine for graphical display. Two popular desktops built on top of X Windows are the K Desktop Environment (KDE) and Gnome. They are intuitive to use, highly customizable, and have on-line help. Currently the default desktop in the labs is KDE.
KDE comes with a integrated file browser (Dolphin) and an integrated web browser (Konqueror), a full Office Suite, a full-featured mail client (KMail), a simple and advanced text editors (kwrite and kate), several multimedia applications and games, a C/C++ IDE (Integrated Development Environment) and thousands of other applications.